If you are embarking on any type of home renovation, avoid those offering to do the work for cash. The results of both the work and the cost are unlikely to be in your favour.
In the busy building environment many tradesmen are undertaking restricted building work without the necessary licence or building consent – this is illegal. Where this is being done as a cash job the home owner has no comeback if things go wrong as they invariably do.
And where work is done illegally you may have trouble selling your home when the time comes. If you are successful in selling, you open yourself up to liability if the work fails in the future.
TVNZ explores this issue, see it here.